package com.job.Gai_Yian.Homework0714;

import java.util.Arrays;
import java.util.Scanner;

/**
 * @author Gai_Yian
 * @version 1.0
 * @since 2022-07-15 00:12:48
 */
public class UseSystem1 {
    public static void main(String[] args) {
        System.out.println(System.getProperty("os.version"));
        System.out.println(System.getProperty("os.name"));
        System.out.println(System.getenv("JAVA_HOME"));


        String name="A";

        long t1=System.currentTimeMillis();
        for (int i=1;i<=77777;i++){
            name+=i;
        }
        long t2=System.currentTimeMillis();
        System.out.println("循环耗时："+(t2-t1)+"ms");
    }
}
